[justrandomanon]

Is a web based photoshop something anyone needs? (I'm talking an app with comparable features, not a basic photo editor).

[dharma1]

You don't need feature parity - even if it initially served the needs of 20-30% of Photoshop users, it would be a threat to Adobe.

The feasibility barrier and cost of building a web app with some of the feature set of Photoshop is getting lower and lower.

If the transfer speed is an issue, it could work on local files - most of the code could be client side.